A researcher wants to test if there is a significance difference between the BMI of regular sugary beverage drinkers in 2010 (me
an BMI = 26.5, reported by the National Health Survey, regular sugary beverage drinker defined as at least 1 sugary beverage drink daily) and in 2015. In December of 2015, the researcher collected a sample of 114 regular sugary beverage drinkers, she measured their BMls and found that the average BMI was 29 with a standard deviation of 3. 1. Which one of the following conclusions is INCORRECT?
a. After conducting the hypothesis testing procedure, the conclusion should be to accept (or fail to reject) the null hypothesis.
b. The critical test statisticis is t = 1.960.
c. The obtained test statistic is t = 8.898.
d. The null hypothesis is that the BMI of regular sugary beverage drinkers in 2010 does not differ from that in 2015.
